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United States Patent | 6,157,401 |
Wiryaman | December 5, 2000 |
A videoconference gatekeeper (18) inspects the alias-address fields in admission-request messages from videoconference endpoints (12, 14, 16) to determine whether their formats indicate that the alias address should be interpreted as a "compound address" designating separate multipoint-conference participants. If so, it causes a multipoint control unit (20) to allocate conference resources to a videoconference among the participants thereby designated. In a registration-request message that the multipoint control unit (20) immediately sends the gatekeeper, it notifies the gatekeeper of the transport address at which it accords access to the conference resources, and the gatekeeper includes this information in an admission-confirm message that it sends the source of the admission-request message.
Inventors: | Wiryaman; Santo (Lexington, MA) |
Assignee: | Ezenia! Inc. (Burlington, MA) |
Appl. No.: | 118245 |
Filed: | July 17, 1998 |
Current U.S. Class: | 348/14.09; 348/14.08; 370/260; 379/93.24 |
Intern'l Class: | H04N 007/14 |
Field of Search: | 348/14,15 370/260,261 379/202,93.24 709/204 |
5491797 | Feb., 1996 | Thompson et al. | 395/200. |
5511168 | Apr., 1996 | Perlman et al. | 395/200. |
5530472 | Jun., 1996 | Bregman et al. | 348/15. |
6018360 | Jan., 2000 | Stewart et al. | 348/15. |
Foreign Patent Documents | |||
8-214272 | Aug., 1996 | JP. | |
10-56513 | Feb., 1998 | JP. | |
WO9414265 | Jun., 1994 | WO. |
Nyrud, Method For Establishing Multipoint conferences, WO 98/57485, Dec. 1998. OnLan 323 L2W 323 Gateway/Gatekeeper USER Manual; 1997: Cover Page, Notice, Table of Contents and pp. 74-75. User Guide: Business Video Conferencing with ProShare Technology; Nov. 1997; Cover Page, Notice and pp. 86-87. D.H. Crocker: "Standard for the Format of ARPA Internet Text Messages" Standard 13, Aug. 1982 XP002118540, Retrieved from Internet: <URL: http://www.cis.ohio-state,edu/htbin/rfc/rf c822.html> p. 3, paragraph 2.7. Thom G A: "H. 323: The Multimedia Communications Standard for Local Area Networks" IEEE Communications Magazine, vol. 34, No. 12, Dec. 1, 1996, pp. 52-56, XP000636454 ISSN: 0163-6804, p. 52--p. 54. |